An experimental technique for the indirect manipulation and detection of electron spins entangled in two-dimensional magnetoexcitons has been developed. The kinetics of the spin relaxation has been investigated. Photoexcited spin-magnetoexcitons were found to exhibit extremely slow relaxation in specific quantum Hall systems, fabricated in high mobility GaAs/AlGaAs structures, namely, the relaxation time reaches values over one hundred microseconds. A qualitative explanation of this spin-relaxation kinetics is presented. Its temperature and magnetic field dependencies are discussed within the available theoretical framework.
@article{arxiv.1507.03089,
title = {Super-long life time for 2D cyclotron spin-flip excitons},
author = {L. V. Kulik and A. V. Gorbunov and A. S. Zhuravlev and V. B. Timofeev and S. Dickmann and I. V. Kukushkin},
journal= {arXiv preprint arXiv:1507.03089},
year = {2015}
}